diff --git a/pkgs/development/perl-modules/Compress-Raw-Bzip2/default.nix b/pkgs/development/perl-modules/Compress-Raw-Bzip2/default.nix
index b0e2ec7d2b1..f6e0da66d78 100644
--- a/pkgs/development/perl-modules/Compress-Raw-Bzip2/default.nix
+++ b/pkgs/development/perl-modules/Compress-Raw-Bzip2/default.nix
@@ -1,11 +1,11 @@
-{fetchurl, buildPerlPackage, bzip2}:
+{ fetchurl, buildPerlPackage, bzip2 }:
 
 buildPerlPackage rec {
-  name = "Compress-Raw-Bzip2-2.015";
+  name = "Compress-Raw-Bzip2-2.037";
     
   src = fetchurl {
-    url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
-    sha256 = "0rc49w7i552j89ws85h7s1bzvs17m065lgy3mj23h0gplkbjnwkp";
+    url = "mirror://cpan/modules/by-module/Compress/${name}.tar.gz";
+    sha256 = "0fhl8dh8mhvpqfqm85amv694ybflckqhyli9y18x8viwaddbxqpy";
   };
 
   # Don't build a private copy of bzip2.
diff --git a/pkgs/development/perl-modules/Compress-Raw-Zlib/default.nix b/pkgs/development/perl-modules/Compress-Raw-Zlib/default.nix
index e83ae68b954..f2e96a49053 100644
--- a/pkgs/development/perl-modules/Compress-Raw-Zlib/default.nix
+++ b/pkgs/development/perl-modules/Compress-Raw-Zlib/default.nix
@@ -1,11 +1,11 @@
-{fetchurl, buildPerlPackage, zlib}:
+{ fetchurl, buildPerlPackage, zlib }:
 
 buildPerlPackage rec {
-  name = "Compress-Raw-Zlib-2.015";
+  name = "Compress-Raw-Zlib-2.037";
     
   src = fetchurl {
-    url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
-    sha256 = "0g6kz73jxqjfln2pi500y7rr96mhad16hrp5wy6542fapamv4xcd";
+    url = "mirror://cpan/modules/by-module/Compress/${name}.tar.gz";
+    sha256 = "18grvxjlsqlqiwxgdf26s4z4q9ag0vacrswxbyaqf11a03sciw7d";
   };
     
   preConfigure = ''
diff --git a/pkgs/development/tools/misc/hydra/default.nix b/pkgs/development/tools/misc/hydra/default.nix
index 2c6bac20f10..caa277bfbf5 100644
--- a/pkgs/development/tools/misc/hydra/default.nix
+++ b/pkgs/development/tools/misc/hydra/default.nix
@@ -1,38 +1,41 @@
-{stdenv, fetchurl, nix, perlPackages, perl, makeWrapper, libtool,
-unzip, nukeReferences, pkgconfig, boehmgc, libxslt, sqlite,
-subversion, openssh, coreutils, findutils, gzip, bzip2, lzma,
-gnutar, git, mercurial, gnused, graphviz, rpm, dpkg, cdrkit
+{ stdenv, fetchurl, nix, perlPackages, perl, makeWrapper, libtool
+, unzip, nukeReferences, pkgconfig, boehmgc, libxslt, sqlite
+, subversion, openssh, coreutils, findutils, gzip, bzip2, lzma
+, gnutar, git, mercurial, gnused, graphviz, rpm, dpkg, cdrkit
 }:
 
 let
-  perldeps = with perlPackages; [ 
-  CatalystDevel
-  CatalystPluginSessionStoreFastMmap
-  CatalystPluginStackTrace
-  CatalystPluginAuthorizationRoles
-  CatalystAuthenticationStoreDBIxClass
-  CatalystViewTT
-  CatalystEngineHTTPPrefork
-  CatalystViewDownload
-  XMLSimple
-  IPCRun
-  IOCompressBzip2
-  Readonly
-  DBDPg
-  EmailSender
-  TextTable
-  NetTwitterLite
-  PadWalker
-  DataDump
-  JSONXS
-  DateTime
-  DigestSHA1
-  CryptRandPasswd
-  nixPerl
-  ];
+
+  perldeps = with perlPackages; 
+    [ CatalystDevel
+      CatalystPluginSessionStoreFastMmap
+      CatalystPluginStackTrace
+      CatalystPluginAuthorizationRoles
+      CatalystAuthenticationStoreDBIxClass
+      CatalystViewTT
+      CatalystEngineHTTPPrefork
+      CatalystViewDownload
+      XMLSimple
+      IPCRun
+      IOCompress
+      Readonly
+      DBDPg
+      EmailSender
+      TextTable
+      NetTwitterLite
+      PadWalker
+      DataDump
+      JSONXS
+      DateTime
+      DigestSHA1
+      CryptRandPasswd
+      nixPerl
+    ];
+
+  version = "0.1pre27592"; 
+
 in
 
-let version = "0.1pre27592"; in
 stdenv.mkDerivation {
   name = "hydra-${version}";
 
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index f353b9c8fd6..f16c45551a3 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -768,9 +768,7 @@ rec {
       url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
       sha256 = "1k1i539fszhxay8yllh687sw06i68g8ikw51pvy1c84p3kg6yk4v";
     };
-    propagatedBuildInputs = [
-      CompressRawZlib IOCompressBase IOCompressGzip
-    ];
+    propagatedBuildInputs = [ CompressRawZlib IOCompress ];
   };
 
   CompressUnLZMA = buildPerlPackage rec {
@@ -779,9 +777,7 @@ rec {
       url = "mirror://cpan/authors/id/F/FE/FERREIRA/${name}.tar.gz";
       sha256 = "0sg9gj3rhif6hgmhwpz6w0g52l65vj5hx9818v5cdhvcif0jhg0b";
     };
-    propagatedBuildInputs = [
-      IOCompressBase
-    ];
+    propagatedBuildInputs = [ IOCompress ];
   };
 
   ConfigAny = buildPerlPackage rec {
@@ -1313,12 +1309,16 @@ rec {
     };
   };
 
-  ExtUtilsMakeMaker = buildPerlPackage {
-    name = "ExtUtils-MakeMaker-6.56";
+  ExtUtilsMakeMaker = buildPerlPackage rec{
+    name = "ExtUtils-MakeMaker-6.59";
     src = fetchurl {
-      url = mirror://cpan/authors/id/M/MS/MSCHWERN/ExtUtils-MakeMaker-6.56.tar.gz;
-      sha256 = "1i24ljkwv4b2nr18a8rr82250wgr3c95pxalzgvfa132w08skd4b";
+      url = "mirror://cpan/modules/by-module/ExtUtils/${name}.tar.gz";
+      sha256 = "0fwhb2cf5x7y87xwml66p624iynf0mzvhy1q4aq5yv7l3lhwhaby";
     };
+    propagatedBuildInputs = 
+      [ ParseCPANMeta version JSONPP CPANMetaYAML CPANMeta
+        FileCopyRecursive VersionRequirements ExtUtilsManifest 
+      ]; 
   };
 
   ExtUtilsManifest = buildPerlPackage rec {
@@ -1358,11 +1358,11 @@ rec {
     };
   };
 
-  FileCopyRecursive = buildPerlPackage {
-    name = "File-Copy-Recursive-0.37";
+  FileCopyRecursive = buildPerlPackage rec {
+    name = "File-Copy-Recursive-0.38";
     src = fetchurl {
-      url = mirror://cpan/authors/id/D/DM/DMUEY/File-Copy-Recursive-0.37.tar.gz;
-      sha256 = "12j0s01zwm67g4bcgbs0k61jwz59q1lndrnxyywxsz3xd30ki8rr";
+      url = "mirror://cpan/authors/id/D/DM/DMUEY/${name}.tar.gz";
+      sha256 = "1syyyvylr51iicialdmv0dw06q49xzv8zrkb5cn8ma4l73gvvk44";
     };
   };
 
@@ -1694,30 +1694,15 @@ rec {
     };
   };
 
-  IOCompressBase = buildPerlPackage rec {
-    name = "IO-Compress-Base-2.015";
+  IOCompress = buildPerlPackage rec {
+    name = "IO-Compress-2.037";
     src = fetchurl {
-      url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
-      sha256 = "10njlwa50mhs5nqws5yidfmmb7hwmwc6x06gk2vnpyn82g3szgqd";
+      url = "mirror://cpan/modules/by-module/IO/${name}.tar.gz";
+      sha256 = "07hs3afzg9ry6ir2f9rf3fg8b129cihs989mr0nh9wdvxgxqmr1q";
     };
-  };
-
-  IOCompressBzip2 = buildPerlPackage rec {
-    name = "IO-Compress-Bzip2-2.015";
-    src = fetchurl {
-      url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
-      sha256 = "1kfksf2bslfkviry228p07m1ksnf06mh8gkmdpbrmlmxlbs2idnc";
-    };
-    propagatedBuildInputs = [IOCompressBase CompressRawBzip2];
-  };
-
-  IOCompressGzip = buildPerlPackage rec {
-    name = "IO-Compress-Zlib-2.015";
-    src = fetchurl {
-      url = "mirror://cpan/authors/id/P/PM/PMQS/${name}.tar.gz";
-      sha256 = "0sbnx6xdryaajwpssrfgm5b2zasa4ri8pihqwsx3rm5kmkgzy9cx";
-    };
-    propagatedBuildInputs = [IOCompressBase CompressRawZlib];
+    propagatedBuildInputs = [ CompressRawBzip2 CompressRawZlib ];
+    # Work around a self-referencing Makefile variable.
+    makeFlags = "INSTALLARCHLIB=$(INSTALLSITEARCH)";
   };
 
   IODigest = buildPerlPackage {